题目
A.the session layer
B.the protocol layer
C.the data link layer
D.the access layer
E.the network layer
F.the application layer
第1题
A.condition: @while
B.@while():condition
C.@WHILE(CONDITION: )
D.@while{condition}()
第4题
A. While crossing the street
B. While the boy was crossing thestreet
C. While crossed the street
D. While crosses the street
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